Dr. Maria I. Kostrzewski, MD
- Medicare services, 2024
- 78
- Medicare patients, 2024
- 26
- Part D claims, 2024
- 3,270
- Industry payments
- $442
- Affiliated sites
- 1
- Practice address
- 6605 W Central Ave, Toledo, OH 43617
- Practice phone
- Call (419) 841-7701
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Zepf Center
Toledo, Ohio
Find Dr. Kostrzewski's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Maria I. Kostrzewski is a psychiatrist in Toledo, Ohio
Dr. Kostrzewski practices at Zepf Center in Toledo, Ohio.
Dr. Kostrzewski's NPI, 1629067814, was assigned on October 19, 2005. Dr. Kostrzewski holds Ohio license 35076359K.
- NPI
- 1629067814NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6507030376
- NPI enumeration date
- October 19, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (419) 841-7701
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 78
- Medical school graduation
- 1974
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Maria I. Kostrzewski practices at Zepf Center in Toledo, Ohio
Dr. Kostrzewski's primary practice is Zepf Center, at 6605 W Central Ave, Toledo, OH 43617 in Lucas County. The practice phone is (419) 841-7701.
- Zepf Center6605 W Central Ave, Toledo, OH 43617 · Lucas CountyPhone(419) 841-7701
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Maria I. Kostrzewski is affiliated with 2 sites of care and 1 medical group
Dr. Kostrzewski's primary practice is Zepf Center in Toledo, Ohio. The medical group on file is Zepf Center. Dmand AI also links Dr. Kostrzewski to 1 more group practice or clinic, named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Maria I. Kostrzewski's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Kostrzewski practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Zepf Center | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Maria I. Kostrzewski is one of 1,227 psychiatrists in Ohio
Psychiatry is Dr. Kostrzewski's primary specialty in the NPI Registry, under taxonomy code 2084P0800X. Dr. Kostrzewski is licensed in Ohio.
Specialties and state licenses
- Psychiatry, OhioPrimary
Psychiatrists near Dr. Kostrzewski
Counts of psychiatrists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Maria I. Kostrzewski billed Medicare for 78 services in 2024
CMS data shows 78 Medicare services from Dr. Kostrzewski across 1 procedure code in 2024, all of them office visits, for 26 Medicare patients. Medicare paid $5,933 for them. Every service was in an office.
Dr. Kostrzewski's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1012024: 7823%
Dr. Kostrzewski compared with the Ohio median for psychiatrists, 2024
- Dr. Kostrzewski
- Ohio median
- Medicare services
- 78vs 13140% below
- Medicare patients
- 26vs 4846% below
- Part D claims
- 3,133vs 25412.3 times
Medians across 1,320 psychiatrists in Ohio with Dmand AI profiles that report each measure.
Dr. Kostrzewski's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Kostrzewski and other psychiatrists in Ohio.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Maria I. Kostrzewski treated 26 Medicare patients in 2024, average age 62
CMS counts 26 Medicare patients who saw Dr. Kostrzewski in 2024. The largest group is under 65, with 14 patients. 58% of them have mood disorders, and 50% have high blood pressure. Their average risk score is 0.96, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Kostrzewski's median patient age at 54, with 45% women.
Dr. Kostrzewski's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Kostrzewski's Medicare patients by sex, 2024
- Women1246%
- Men1454%
Chronic conditions among Dr. Kostrzewski's Medicare patients, 2024
- Mood disorders58%
- High blood pressure50%
- Anxiety46%
- Schizophrenia and other psychoses42%
Share of Medicare patients with each condition. A patient can have several.
Dr. Kostrzewski's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 54
Patient panel by sex, all payers
- Women45%
- Men45%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Maria I. Kostrzewski wrote 3,270 Medicare Part D claims in 2024
In 2024, Dr. Kostrzewski wrote 3,270 Medicare Part D claims for 114 patients. 91% of them were for generic drugs. CMS names the drug for 3,133 of them, across 48 drugs with 11 or more claims each, at $622,110 in total drug cost. In 2023, CMS named 3,435 claims across 54 drugs.
Dr. Kostrzewski's Part D claims by kind of drug, 2024
- Generic2,970 claims91%
- Brand-name300 claims9%
Dr. Kostrzewski's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Kostrzewski's Part D claims, 2024
- Antipsychotics, patients 65 and over6%212 of 3,270 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 3,4352024: 3,1339%
Drugs named by CMS: 48 in 2024, 54 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Maria I. Kostrzewski takes part in Medicare
Dr. Kostrzewski accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Maria I. Kostrzewski received $442 in industry payments from 2016 to 2025
CMS Open Payments shows 29 general payments to Dr. Kostrzewski from 8 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 98% of the total. Novo Nordisk Inc paid the most, $123.
General payments to Dr. Kostrzewski by program year, 2016 to 2025
General payments to Dr. Kostrzewski by kind, 2016 to 2025
- Food and beverage$43298%
- Education$92%
Companies that paid Dr. Kostrzewski the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Maria I. Kostrzewski's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Maria I. Kostrzewski
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Maria I. Kostrzewski's NPI number?
Dr. Maria I. Kostrzewski's NPI number is 1629067814. It was assigned on October 19, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Maria I. Kostrzewski?
Dr. Maria I. Kostrzewski is a psychiatrist in Toledo, Ohio. The primary specialty in the NPI Registry is Psychiatry Physician (taxonomy code 2084P0800X).
Where does Dr. Maria I. Kostrzewski practice?
Dr. Kostrzewski practices at 6605 W Central Ave, Toledo, OH 43617. Dr. Kostrzewski's primary practice is Zepf Center in Toledo, Ohio. Dmand AI also links Dr. Kostrzewski to 1 group practice or clinic.
What is Dr. Maria I. Kostrzewski's office phone number?
The practice phone on file for Dr. Kostrzewski is (419) 841-7701.
What is Dr. Maria I. Kostrzewski's medical license number?
Dr. Kostrzewski holds Ohio license 35076359K.
What medical group is Dr. Maria I. Kostrzewski part of?
Dr. Kostrzewski is linked to Zepf Center.
Does Dr. Maria I. Kostrzewski accept Medicare?
Yes. CMS data shows Dr. Kostrzewski billed Medicare for 78 services in 2024, and Dr. Kostrzewski accepts Medicare assignment.
How many Medicare patients does Dr. Maria I. Kostrzewski see?
CMS counts 26 Medicare patients who saw Dr. Kostrzewski in 2024, with an average age of 62.
What services does Dr. Maria I. Kostrzewski bill to Medicare?
In 2024, Dr. Kostrzewski's most billed Medicare services were office visit, established patient (99214).
What drugs does Dr. Maria I. Kostrzewski prescribe most?
In 2024 Medicare Part D data, Dr. Kostrzewski's most prescribed drugs by claims were Trazodone HCl, Hydroxyzine HCl and Bupropion XL.
Has Dr. Maria I. Kostrzewski received payments from drug or device companies?
CMS Open Payments shows $442 in general payments to Dr. Kostrzewski from 8 companies from 2016 to 2025. The largest total came from Novo Nordisk Inc.
How long has Dr. Maria I. Kostrzewski been practicing?
Dr. Kostrzewski graduated from medical school in 1974, 52 years ago.
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